The next number in the series 2-4-3-9-4 is 16.
2 squared is 4, 3 squared is 9, 4 squared is 16
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Add the previous 2 numbers to get the next number.
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
The next number is 13, the total of the two numbers preceding it.
The pattern is this: The number before, plus itself plus 2. For example: 1 (number)+ 0 (number berfore)+ 2 (always use a two in this pattern) = 3 then 1+3+2=6 then 3+6+2+11 and 6+11+2=19, which is your pattern. So the answer is 11+19+2=32. Now the pattern is 1,3,6,11,19,32 Thats a wrap.
10.1(+2) 3 (+3) 6 (+4) 10